/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */

package cgl.narada.service.replay.impl;

import java.util.Hashtable;

import cgl.narada.event.NBEvent;
import cgl.narada.event.NBEventTypes;
import cgl.narada.event.TemplateProfileAndSynopsisTypes;
import cgl.narada.event.impl.NBEventGenerator;
import cgl.narada.matching.Profile;
import cgl.narada.service.ServiceException;
import cgl.narada.service.client.ClientService;
import cgl.narada.service.client.EventConsumer;
import cgl.narada.service.client.EventProducer;
import cgl.narada.service.client.NBEventListener;
import cgl.narada.service.client.SessionService;
import cgl.narada.service.qos.impl.QosServiceImpl;
import cgl.narada.service.replay.ReplayEvent;
import cgl.narada.service.replay.ReplayRequest;
import cgl.narada.service.replay.ReplayResponse;
import cgl.narada.service.replay.ReplayServiceExchange;
import cgl.narada.service.replay.ReplayServiceListener;

/*
 @author Shrideep Pallickara
 $Date$
 $Revision$
 */

public class ReplayActuator implements NBEventListener {

  private int            entityId;
  private ClientService  clientService;
  private EventConsumer  eventConsumer;
  private EventProducer  eventProducer;

  private String         replayTopicString = "/ReplayServices";

  private Hashtable      replayListeners;
  private String         moduleName        = "ReplayActuator: ";

  private QosServiceImpl qosServiceImpl;

  protected ReplayActuator(int entityId, QosServiceImpl qosServiceImpl)
      throws ServiceException {
    this.entityId = entityId;
    this.qosServiceImpl = qosServiceImpl;
    initializeProducerAndConsumer();
    replayListeners = new Hashtable();
  }

  private void initializeProducerAndConsumer() throws ServiceException {
    /** Subscribe to the right topics and such */
    clientService = SessionService.getClientService(entityId);
    if (!clientService.isInitialized()) {
      throw new ServiceException(moduleName + "Client service for entity="
          + entityId + " should have been previously initialized");
    }
    eventConsumer = clientService.createEventConsumer(this);
    eventProducer = clientService.createEventProducer();

    String entityReplayListenerTopic = entityId + replayTopicString;
    Profile profile = clientService.createProfile(
        TemplateProfileAndSynopsisTypes.STRING, entityReplayListenerTopic);
    eventConsumer = clientService.createEventConsumer(this);
    eventConsumer.subscribeTo(profile);
  }

  /** Initiate replay based on the create replay request */
  protected void initiateReplay(ReplayRequest replayRequest,
      ReplayServiceListener replayListener) throws ServiceException {
    String replayIdentifier = replayRequest.getReplayIdentifier();
    if (replayListeners.containsKey(replayIdentifier)) {
      replayListeners.remove(replayIdentifier);
    }
    replayListeners.put(replayIdentifier, replayListener);

    int templateId = replayRequest.getTemplateId();
    String replayServiceTopic = replayTopicString + "/" + templateId;

    NBEvent nbReplayRequest = eventProducer.generateEvent(
        TemplateProfileAndSynopsisTypes.STRING, replayServiceTopic,
        replayRequest.getBytes());
    NBEventGenerator
        .setEventType(nbReplayRequest, NBEventTypes.REPLAY_EXCHANGE);
    eventProducer.publishEvent(nbReplayRequest);
  }

  protected void replayToTopic(ReplayRequest replayRequest,
      ReplayServiceListener replayListener) throws ServiceException {
    String replayIdentifier = replayRequest.getReplayIdentifier();
    if (replayListeners.containsKey(replayIdentifier)) {
      replayListeners.remove(replayIdentifier);
    }
    replayListeners.put(replayIdentifier, replayListener);

    int templateId = replayRequest.getTemplateId();
    String replayServiceTopic = replayRequest.getReplayTopic();

    NBEvent nbReplayRequest = eventProducer.generateEvent(
        TemplateProfileAndSynopsisTypes.STRING, replayServiceTopic,
        replayRequest.getBytes());
    NBEventGenerator
        .setEventType(nbReplayRequest, NBEventTypes.REPLAY_EXCHANGE);
    eventProducer.publishEvent(nbReplayRequest);
  }

  public void onEvent(NBEvent nbEvent) {
    int eventType = nbEvent.getEventType();
    byte[] contentPayload = nbEvent.getContentPayload();
    byte exchangeType = contentPayload[0];

    if (eventType == NBEventTypes.NORMAL_EVENT) {
      System.out.println(moduleName + "Received normal event .." + nbEvent
          + " should NOT have received this");
      return;
    }

    if (eventType == NBEventTypes.REPLAY_EXCHANGE) {
      if (exchangeType == ReplayServiceExchange.REPLAY_SERVICE_RESPONSE) {
        ReplayResponse replayResponse = new ReplayResponseEvent(contentPayload);
        String replayIdentifer = replayResponse.getReplayIdentifier();

        if (replayListeners.containsKey(replayIdentifer)) {
          ReplayServiceListener replayListener = (ReplayServiceListener) replayListeners
              .get(replayIdentifer);
          replayListener.onReplayResponse(replayResponse);
        } else {
          System.out.println(moduleName + "ReplayListener for Replay "
              + "Identifier [" + replayIdentifer + "] not available!");
        }
        return;
      }

      if (exchangeType == ReplayServiceExchange.REPLAY_SERVICE_REPLAY_EVENT) {
        ReplayEvent replayEvent = new ReplayEventImpl(contentPayload);
        String replayIdentifer = replayEvent.getReplayIdentifier();

        if (replayListeners.containsKey(replayIdentifer)) {
          ReplayServiceListener replayListener = (ReplayServiceListener) replayListeners
              .get(replayIdentifer);
          //replayListener.onReplay(replayEvent);
          System.out.println(moduleName+" "+replayEvent.getNBEvent().getContentSynopsis().toString());
          qosServiceImpl.processReceivedEvent(replayEvent.getNBEvent());
        } else {
          System.out.println(moduleName + "ReplayListener for Replay "
              + "Identifier [" + replayIdentifer + "] not available!");
        }
        return;
      }

      return;
    }

    System.out.println(moduleName + "Unknown event type [" + eventType
        + "] received ");
  }

}